Alert archive / Massachusetts / Tornado Warnings in 1999

Tornado Warning 2, NWS Boston/Norton, MA

July 6, 1999Plymouth County, Massachusetts

NWS Boston/Norton, MA issued this tornado warning at Jul 6, 1999, 6:59 PM EDT for Plymouth County, Massachusetts. It was in force for 46 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Jul 6, 1999, 6:59 PM EDT (22:59 UTC)
Expired: Jul 6, 1999, 7:45 PM EDT
In force: 46 min
Issued by: NWS Boston/Norton, MA
Area: Whole counties

County Plymouth County, MA

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Jul 6, 3:00 PM EDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Chatham, MA (KCHH), launched 12:00Z, 11.0 hours before the alert went out and 73 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 457 J/kg
Mixed-layer CIN: -159 J/kg
Mixed-layer LCL: 1321 m above ground
0-6 km bulk shear: 43 kt
0-1 km storm-relative helicity: 17 m²/s²
0-3 km storm-relative helicity: 93 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
TTAA00 KBOX 062259 RRA
TORBOS
MAC023-062345-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE TAUNTON MA
659 PM EDT TUE JUL 6 1999

THE NATIONAL WEATHER SERVICE IN TAUNTON HAS ISSUED A

* TORNADO WARNING FOR...
  SOUTHERN PLYMOUTH COUNTY IN MASSACHUSETTS

* UNTIL 745 PM EDT.

* AT 649 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  A TORNADO 2 MILES NORTH OF BRIDGEWATER...MOVING SOUTHEAST AT
  15 MPH.

* OTHER LOCATIONS NEAR THE PATH OF THE TORNADO INCLUDE BRIDGEWATER
  AND MIDDLEBOROUGH.

* OTHER SEVERE THUNDERSTORMS WILL IMPACT SOUTHERN PLYMOUTH COUNTY
  THROUGH 745 PM...WITH LARGE HAIL AND DAMAGING WINDS.

THIS IS A DANGEROUS STORM - TAKE COVER NOW IN THE BASEMENT OR A SMALL
INTERIOR ROOM ON THE LOWEST FLOOR. PROTECT YOUR BODY FROM FLYING
DEBRIS WITH BLANKETS OR PILLOWS.
$$

JWD/FIELD

The office that day

Everything else NWS Boston/Norton, MA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 6, 3:39 PM EDT	Severe Thunderstorm Warning	BOX	Franklin	51 min
Jul 6, 4:22 PM EDT	Severe Thunderstorm Warning	BOX	Hampshire	38 min
Jul 6, 4:27 PM EDT	Severe Thunderstorm Warning	BOX	Worcester	63 min
Jul 6, 4:31 PM EDT	Severe Thunderstorm Warning	BOX	Franklin	29 min
Jul 6, 4:42 PM EDT	Severe Thunderstorm Warning	BOX	Hampden	63 min
Jul 6, 4:55 PM EDT	Severe Thunderstorm Warning	BOX	Essex, Middlesex	65 min
Jul 6, 4:58 PM EDT	Severe Thunderstorm Warning	BOX	Hampshire	62 min
Jul 6, 5:15 PM EDT	Severe Thunderstorm Warning	BOX	Middlesex, Worcester	60 min
Jul 6, 5:33 PM EDT	Severe Thunderstorm Warning	BOX	Norfolk, Suffolk	57 min
Jul 6, 5:57 PM EDT	Severe Thunderstorm Warning	BOX	Plymouth	63 min
Jul 6, 6:26 PM EDT	Tornado Warning	BOX	Norfolk, Plymouth	34 min
Jul 6, 7:20 PM EDT	Severe Thunderstorm Warning	BOX	Plymouth	25 min
Jul 6, 7:45 PM EDT	Severe Thunderstorm Warning	BOX	Barnstable, Plymouth	30 min

Nearby

Tornado Warnings in Massachusetts, 1999 Every tornado warning in 1999 Tornadoes in 1999

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive.